File:Cardiac Conduction System.jpg

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Cardiac Conduction System in the Adult Heart

Electrical conduction system of the heart occurs through specially modified cardiac muscle cells.

  • Week 7 {{GA)) - SA node initially develops in the sinus venosus and then is incorporated into the RA.
  • AV node arises slightly superior to the endocardial cushions.

  • SA node - sinoatrial node located on the anterior border of the opening of the superior vena cava.
  • AV node - atrioventricular node located near the orifice of the coronary sinus in the annular and septal fibres of the right atrium.
  • bundle of His
    • Left bundle branch
    • Right bundle branch
    • moderator band - primary conduction path in to the free wall originating from the right bundle branch.


<pubmed>19808465</pubmed> <pubmed>16148066</pubmed> <pubmed>20811536</pubmed> <pubmed>12382942</pubmed> <pubmed>20235167</pubmed>

Cite this page: Hill, M.A. (2020, October 22) Embryology Cardiac Conduction System.jpg. Retrieved from

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© Dr Mark Hill 2020, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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current13:03, 14 March 2010Thumbnail for version as of 13:03, 14 March 20101,201 × 862 (81 KB)Z3212774 (talk | contribs)category:Heart ILP Cardiac conduction system in the adult heart.